Fixed hang in Messenger.stop(); added recv() to Messenger interface.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1516427 13f79535-47bb-0310-9956-ffa450edef68
added target directories to svn:ignore

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1516430 13f79535-47bb-0310-9956-ffa450edef68
added target to svn:ignore

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1516431 13f79535-47bb-0310-9956-ffa450edef68
PROTON-397: added example contributed by Marc Berkowitz

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1516433 13f79535-47bb-0310-9956-ffa450edef68